diff --git a/src/i18n/messages/ar.json b/src/i18n/messages/ar.json
index cd527fec..3ee7fbcb 100644
--- a/src/i18n/messages/ar.json
+++ b/src/i18n/messages/ar.json
@@ -4,6 +4,7 @@
   "discussions.comments.comment.addResponse": "Add a response",
   "discussions.comments.comment.addComment": "Add a comment",
   "discussions.comments.comment.abuseFlaggedMessage": "Content reported for staff to review",
+  "discussions.actions.back.alt": "Back to list",
   "discussions.comments.comment.responseCount": "{num, plural,\n      =0 {No responses}\n      one {Showing # response}\n      other {Showing # responses}\n    }",
   "discussions.comments.comment.endorsedResponseCount": "{num, plural,\n      =0 {No endorsed responses}\n      one {Showing # endorsed response}\n      other {Showing # endorsed responses}\n    }",
   "discussions.comments.comment.loadMoreComments": "Load more comments",
@@ -47,7 +48,6 @@
   "discussion.learner.allActivity": "All activity",
   "discussion.learner.posts": "Posts",
   "discussions.actions.button.alt": "Actions menu",
-  "discussions.actions.back.alt": "Back",
   "discussions.actions.copylink": "Copy link",
   "discussions.actions.unpin": "Unpin",
   "discussions.actions.close": "Close",
@@ -123,6 +123,8 @@
   "discussions.post.editor.anonymousToPeersPost": "Post anonymously to peers",
   "discussions.editor.posts.editReasonCode": "Reason for editing",
   "discussions.editor.posts.showPreview.button": "Show Preview",
+  "discussions.topic.noName.label": "Unnamed category",
+  "discussions.subtopic.noName.label": "Unnamed subcategory",
   "discussions.posts.filter.showALl": "Show all",
   "discussions.posts.filter.discussions": "Discussions",
   "discussions.posts.filter.questions": "Questions",
@@ -132,7 +134,7 @@
   "discussions.posts.status.filter.following": "Following",
   "discussions.posts.status.filter.reported": "Reported",
   "discussions.posts.status.filter.unanswered": "Unanswered",
-  "discussions.posts.status.filter.unresponded": "Unresponded",
+  "discussions.posts.status.filter.unresponded": "Not responded",
   "discussions.posts.filter.myPosts": "My posts",
   "discussions.posts.filter.myDiscussions": "My discussions",
   "discussions.posts.filter.myQuestions": "My questions",
@@ -175,5 +177,6 @@
   "discussions.topics.sort.courseStructure": "Course Structure",
   "discussions.topics.find.label": "Search topics",
   "discussions.topics.archived.label": "Archived",
-  "discussions.topics.unnamed.label": "Unnamed Topic"
+  "discussions.topics.unnamed.label": "Unnamed category",
+  "discussions.subtopics.unnamed.label": "Unnamed subcategory"
 }
\ No newline at end of file
diff --git a/src/i18n/messages/de_DE.json b/src/i18n/messages/de_DE.json
index cd527fec..3ee7fbcb 100644
--- a/src/i18n/messages/de_DE.json
+++ b/src/i18n/messages/de_DE.json
@@ -4,6 +4,7 @@
   "discussions.comments.comment.addResponse": "Add a response",
   "discussions.comments.comment.addComment": "Add a comment",
   "discussions.comments.comment.abuseFlaggedMessage": "Content reported for staff to review",
+  "discussions.actions.back.alt": "Back to list",
   "discussions.comments.comment.responseCount": "{num, plural,\n      =0 {No responses}\n      one {Showing # response}\n      other {Showing # responses}\n    }",
   "discussions.comments.comment.endorsedResponseCount": "{num, plural,\n      =0 {No endorsed responses}\n      one {Showing # endorsed response}\n      other {Showing # endorsed responses}\n    }",
   "discussions.comments.comment.loadMoreComments": "Load more comments",
@@ -47,7 +48,6 @@
   "discussion.learner.allActivity": "All activity",
   "discussion.learner.posts": "Posts",
   "discussions.actions.button.alt": "Actions menu",
-  "discussions.actions.back.alt": "Back",
   "discussions.actions.copylink": "Copy link",
   "discussions.actions.unpin": "Unpin",
   "discussions.actions.close": "Close",
@@ -123,6 +123,8 @@
   "discussions.post.editor.anonymousToPeersPost": "Post anonymously to peers",
   "discussions.editor.posts.editReasonCode": "Reason for editing",
   "discussions.editor.posts.showPreview.button": "Show Preview",
+  "discussions.topic.noName.label": "Unnamed category",
+  "discussions.subtopic.noName.label": "Unnamed subcategory",
   "discussions.posts.filter.showALl": "Show all",
   "discussions.posts.filter.discussions": "Discussions",
   "discussions.posts.filter.questions": "Questions",
@@ -132,7 +134,7 @@
   "discussions.posts.status.filter.following": "Following",
   "discussions.posts.status.filter.reported": "Reported",
   "discussions.posts.status.filter.unanswered": "Unanswered",
-  "discussions.posts.status.filter.unresponded": "Unresponded",
+  "discussions.posts.status.filter.unresponded": "Not responded",
   "discussions.posts.filter.myPosts": "My posts",
   "discussions.posts.filter.myDiscussions": "My discussions",
   "discussions.posts.filter.myQuestions": "My questions",
@@ -175,5 +177,6 @@
   "discussions.topics.sort.courseStructure": "Course Structure",
   "discussions.topics.find.label": "Search topics",
   "discussions.topics.archived.label": "Archived",
-  "discussions.topics.unnamed.label": "Unnamed Topic"
+  "discussions.topics.unnamed.label": "Unnamed category",
+  "discussions.subtopics.unnamed.label": "Unnamed subcategory"
 }
\ No newline at end of file
diff --git a/src/i18n/messages/es_419.json b/src/i18n/messages/es_419.json
index 7e7a07d3..21c2d7e1 100644
--- a/src/i18n/messages/es_419.json
+++ b/src/i18n/messages/es_419.json
@@ -4,6 +4,7 @@
   "discussions.comments.comment.addResponse": "Agregar una respuesta",
   "discussions.comments.comment.addComment": "Agregar un comentario",
   "discussions.comments.comment.abuseFlaggedMessage": "Contenido informado para que el personal lo revise",
+  "discussions.actions.back.alt": "Back to list",
   "discussions.comments.comment.responseCount": "{num, plural, =0 {No responses} one {Showing # response} other {Showing # responses} }",
   "discussions.comments.comment.endorsedResponseCount": "{num, plural, =0 {Sin respuestas respaldadas} one {Mostrando # respuesta respaldada} other {Mostrando # respuestas respaldadas} }",
   "discussions.comments.comment.loadMoreComments": "Cargar más comentarios",
@@ -47,7 +48,6 @@
   "discussion.learner.allActivity": "Toda la actividad",
   "discussion.learner.posts": "Publicaciones",
   "discussions.actions.button.alt": "Menú de acciones",
-  "discussions.actions.back.alt": "Volver atrás",
   "discussions.actions.copylink": "Copiar link",
   "discussions.actions.unpin": "Desmarcar",
   "discussions.actions.close": "Cerrar",
@@ -123,6 +123,8 @@
   "discussions.post.editor.anonymousToPeersPost": "Publicar de forma anónima para tus compañeros",
   "discussions.editor.posts.editReasonCode": "Motivo de la edición",
   "discussions.editor.posts.showPreview.button": "Mostrar vista previa",
+  "discussions.topic.noName.label": "Unnamed category",
+  "discussions.subtopic.noName.label": "Unnamed subcategory",
   "discussions.posts.filter.showALl": "Mostrar todo",
   "discussions.posts.filter.discussions": "Debates\n",
   "discussions.posts.filter.questions": "Preguntas",
@@ -132,7 +134,7 @@
   "discussions.posts.status.filter.following": "Siguiendo",
   "discussions.posts.status.filter.reported": "Informado",
   "discussions.posts.status.filter.unanswered": "Sin responder",
-  "discussions.posts.status.filter.unresponded": "Unresponded",
+  "discussions.posts.status.filter.unresponded": "Not responded",
   "discussions.posts.filter.myPosts": "Mis publicaciones",
   "discussions.posts.filter.myDiscussions": "Mis debates",
   "discussions.posts.filter.myQuestions": "Mis preguntas",
@@ -153,7 +155,7 @@
   "discussions.post.removeLike": "Dejar de gustar",
   "discussions.post.viewActivity": "Ver actividad",
   "discussions.post.closed": "Publicación cerrada por respuestas y comentarios.",
-  "discussions.post.relatedTo": "Relacionado con",
+  "discussions.post.relatedTo": "Related to",
   "discussions.editor.delete.post.title": "Eliminar mensaje",
   "discussions.editor.delete.post.description": "¿Seguro que quieres eliminar esta publicación de forma permanente?",
   "discussions.post.closePostModal.title": "Cerrar publicación",
@@ -175,5 +177,6 @@
   "discussions.topics.sort.courseStructure": "Estructura del curso",
   "discussions.topics.find.label": "Buscar temas",
   "discussions.topics.archived.label": "Archivado",
-  "discussions.topics.unnamed.label": "Tema sin nombre"
+  "discussions.topics.unnamed.label": "Unnamed category",
+  "discussions.subtopics.unnamed.label": "Unnamed subcategory"
 }
\ No newline at end of file
diff --git a/src/i18n/messages/fr.json b/src/i18n/messages/fr.json
index ba90b269..3b7d3a5c 100644
--- a/src/i18n/messages/fr.json
+++ b/src/i18n/messages/fr.json
@@ -4,6 +4,7 @@
   "discussions.comments.comment.addResponse": "Ajouter une réponse",
   "discussions.comments.comment.addComment": "Ajouter un commentaire",
   "discussions.comments.comment.abuseFlaggedMessage": "Contenu signalé au personnel pour examen",
+  "discussions.actions.back.alt": "Back to list",
   "discussions.comments.comment.responseCount": "{num, plural,\n      =0 {No responses}\n      one {Showing # response}\n      other {Showing # responses}\n    }",
   "discussions.comments.comment.endorsedResponseCount": "{num, plural,\n      =0 {No endorsed responses}\n      one {Showing # endorsed response}\n      other {Showing # endorsed responses}\n    }",
   "discussions.comments.comment.loadMoreComments": "Charger plus de commentaires",
@@ -47,7 +48,6 @@
   "discussion.learner.allActivity": "All activity",
   "discussion.learner.posts": "Posts",
   "discussions.actions.button.alt": "Actions menu",
-  "discussions.actions.back.alt": "Back",
   "discussions.actions.copylink": "Copy link",
   "discussions.actions.unpin": "Unpin",
   "discussions.actions.close": "Close",
@@ -123,6 +123,8 @@
   "discussions.post.editor.anonymousToPeersPost": "Post anonymously to peers",
   "discussions.editor.posts.editReasonCode": "Reason for editing",
   "discussions.editor.posts.showPreview.button": "Show Preview",
+  "discussions.topic.noName.label": "Unnamed category",
+  "discussions.subtopic.noName.label": "Unnamed subcategory",
   "discussions.posts.filter.showALl": "Show all",
   "discussions.posts.filter.discussions": "Discussions",
   "discussions.posts.filter.questions": "Questions",
@@ -132,7 +134,7 @@
   "discussions.posts.status.filter.following": "Following",
   "discussions.posts.status.filter.reported": "Reported",
   "discussions.posts.status.filter.unanswered": "Unanswered",
-  "discussions.posts.status.filter.unresponded": "Unresponded",
+  "discussions.posts.status.filter.unresponded": "Not responded",
   "discussions.posts.filter.myPosts": "My posts",
   "discussions.posts.filter.myDiscussions": "My discussions",
   "discussions.posts.filter.myQuestions": "My questions",
@@ -175,5 +177,6 @@
   "discussions.topics.sort.courseStructure": "Course Structure",
   "discussions.topics.find.label": "Search topics",
   "discussions.topics.archived.label": "Archived",
-  "discussions.topics.unnamed.label": "Unnamed Topic"
+  "discussions.topics.unnamed.label": "Unnamed category",
+  "discussions.subtopics.unnamed.label": "Unnamed subcategory"
 }
\ No newline at end of file
diff --git a/src/i18n/messages/fr_CA.json b/src/i18n/messages/fr_CA.json
index 94e96bf6..9b9327b9 100644
--- a/src/i18n/messages/fr_CA.json
+++ b/src/i18n/messages/fr_CA.json
@@ -4,6 +4,7 @@
   "discussions.comments.comment.addResponse": "Ajouter une réponse",
   "discussions.comments.comment.addComment": "Ajouter un commentaire",
   "discussions.comments.comment.abuseFlaggedMessage": "Contenu signalé au personnel pour examen",
+  "discussions.actions.back.alt": "Retour à la liste",
   "discussions.comments.comment.responseCount": "{num, plural,\n      =0 {Aucune réponse}\n     one {Affiche # réponse}\n     other {Affiche # réponses}\n    }",
   "discussions.comments.comment.endorsedResponseCount": "{num, plural,\n      =0 {No endorsed responses}\n      one {Showing # endorsed response}\n      other {Showing # endorsed responses}\n    }",
   "discussions.comments.comment.loadMoreComments": "Charger plus de commentaires",
@@ -42,12 +43,11 @@
   "discussions.learner.activityForLearner": "Activité pour {username}",
   "discussions.learner.mostActivity": "La plupart des activités",
   "discussions.learner.reportedActivity": "Activité signalée",
-  "discussions.learner.recentActivity": "Recent activity",
+  "discussions.learner.recentActivity": "Activité récente",
   "discussions.learner.sortFilterStatus": "Tous les apprenants par {sort, select,\n      flagged {reported activity}\n      activity {most activity}\n      other {{sort}}\n    }",
   "discussion.learner.allActivity": "Toutes les activités",
   "discussion.learner.posts": "Posts",
   "discussions.actions.button.alt": "Menu Actions",
-  "discussions.actions.back.alt": "Retour",
   "discussions.actions.copylink": "Copier le lien",
   "discussions.actions.unpin": "Détacher",
   "discussions.actions.close": "Fermer",
@@ -123,6 +123,8 @@
   "discussions.post.editor.anonymousToPeersPost": "Publiez anonymement à vos pairs",
   "discussions.editor.posts.editReasonCode": "Raison de la modification",
   "discussions.editor.posts.showPreview.button": "Afficher l'aperçu",
+  "discussions.topic.noName.label": "Catégorie sans nom",
+  "discussions.subtopic.noName.label": "Sous-catégorie sans nom",
   "discussions.posts.filter.showALl": "Tout afficher",
   "discussions.posts.filter.discussions": "Discussions",
   "discussions.posts.filter.questions": "Questions",
@@ -132,7 +134,7 @@
   "discussions.posts.status.filter.following": "Suivi",
   "discussions.posts.status.filter.reported": "Reporté",
   "discussions.posts.status.filter.unanswered": "Non répondu",
-  "discussions.posts.status.filter.unresponded": "Sans réponse",
+  "discussions.posts.status.filter.unresponded": "Pas répondu",
   "discussions.posts.filter.myPosts": "Mes messages",
   "discussions.posts.filter.myDiscussions": "Mes discussions",
   "discussions.posts.filter.myQuestions": "Mes questions",
@@ -175,5 +177,6 @@
   "discussions.topics.sort.courseStructure": "Structure du cours",
   "discussions.topics.find.label": "Rechercher des sujets",
   "discussions.topics.archived.label": "Archivé",
-  "discussions.topics.unnamed.label": "Sujet sans nom"
+  "discussions.topics.unnamed.label": "Catégorie sans nom",
+  "discussions.subtopics.unnamed.label": "Sous-catégorie sans nom"
 }
\ No newline at end of file
diff --git a/src/i18n/messages/fr_FR.json b/src/i18n/messages/fr_FR.json
index cd527fec..3ee7fbcb 100644
--- a/src/i18n/messages/fr_FR.json
+++ b/src/i18n/messages/fr_FR.json
@@ -4,6 +4,7 @@
   "discussions.comments.comment.addResponse": "Add a response",
   "discussions.comments.comment.addComment": "Add a comment",
   "discussions.comments.comment.abuseFlaggedMessage": "Content reported for staff to review",
+  "discussions.actions.back.alt": "Back to list",
   "discussions.comments.comment.responseCount": "{num, plural,\n      =0 {No responses}\n      one {Showing # response}\n      other {Showing # responses}\n    }",
   "discussions.comments.comment.endorsedResponseCount": "{num, plural,\n      =0 {No endorsed responses}\n      one {Showing # endorsed response}\n      other {Showing # endorsed responses}\n    }",
   "discussions.comments.comment.loadMoreComments": "Load more comments",
@@ -47,7 +48,6 @@
   "discussion.learner.allActivity": "All activity",
   "discussion.learner.posts": "Posts",
   "discussions.actions.button.alt": "Actions menu",
-  "discussions.actions.back.alt": "Back",
   "discussions.actions.copylink": "Copy link",
   "discussions.actions.unpin": "Unpin",
   "discussions.actions.close": "Close",
@@ -123,6 +123,8 @@
   "discussions.post.editor.anonymousToPeersPost": "Post anonymously to peers",
   "discussions.editor.posts.editReasonCode": "Reason for editing",
   "discussions.editor.posts.showPreview.button": "Show Preview",
+  "discussions.topic.noName.label": "Unnamed category",
+  "discussions.subtopic.noName.label": "Unnamed subcategory",
   "discussions.posts.filter.showALl": "Show all",
   "discussions.posts.filter.discussions": "Discussions",
   "discussions.posts.filter.questions": "Questions",
@@ -132,7 +134,7 @@
   "discussions.posts.status.filter.following": "Following",
   "discussions.posts.status.filter.reported": "Reported",
   "discussions.posts.status.filter.unanswered": "Unanswered",
-  "discussions.posts.status.filter.unresponded": "Unresponded",
+  "discussions.posts.status.filter.unresponded": "Not responded",
   "discussions.posts.filter.myPosts": "My posts",
   "discussions.posts.filter.myDiscussions": "My discussions",
   "discussions.posts.filter.myQuestions": "My questions",
@@ -175,5 +177,6 @@
   "discussions.topics.sort.courseStructure": "Course Structure",
   "discussions.topics.find.label": "Search topics",
   "discussions.topics.archived.label": "Archived",
-  "discussions.topics.unnamed.label": "Unnamed Topic"
+  "discussions.topics.unnamed.label": "Unnamed category",
+  "discussions.subtopics.unnamed.label": "Unnamed subcategory"
 }
\ No newline at end of file
diff --git a/src/i18n/messages/it_IT.json b/src/i18n/messages/it_IT.json
index 4ea17923..f84f68e9 100644
--- a/src/i18n/messages/it_IT.json
+++ b/src/i18n/messages/it_IT.json
@@ -4,6 +4,7 @@
   "discussions.comments.comment.addResponse": "Aggiungi una risposta",
   "discussions.comments.comment.addComment": "Aggiungi un commento",
   "discussions.comments.comment.abuseFlaggedMessage": "Contenuto segnalato per la revisione da parte del personale",
+  "discussions.actions.back.alt": "Back to list",
   "discussions.comments.comment.responseCount": "{num, plural, =0 {Nessuna risposta} one {Mostra # risposte} other {Mostra # risposte} }",
   "discussions.comments.comment.endorsedResponseCount": "{num, plural, =0 {Nessuna risposta approvata} one {Mostra # risposta approvata} other {Mostra # risposte approvate} }",
   "discussions.comments.comment.loadMoreComments": "Carica più commenti",
@@ -47,7 +48,6 @@
   "discussion.learner.allActivity": "All activity",
   "discussion.learner.posts": "Posts",
   "discussions.actions.button.alt": "Menù Azioni",
-  "discussions.actions.back.alt": "Indietro",
   "discussions.actions.copylink": "Copia link",
   "discussions.actions.unpin": "Sblocca ",
   "discussions.actions.close": "Chiudi",
@@ -123,6 +123,8 @@
   "discussions.post.editor.anonymousToPeersPost": "Pubblica in modo anonimo ai colleghi",
   "discussions.editor.posts.editReasonCode": "Motivo della modifica",
   "discussions.editor.posts.showPreview.button": "Anteprima dello spettacolo",
+  "discussions.topic.noName.label": "Unnamed category",
+  "discussions.subtopic.noName.label": "Unnamed subcategory",
   "discussions.posts.filter.showALl": "Mostra tutto",
   "discussions.posts.filter.discussions": "Discussioni",
   "discussions.posts.filter.questions": "Domande",
@@ -132,7 +134,7 @@
   "discussions.posts.status.filter.following": "Seguente",
   "discussions.posts.status.filter.reported": "Segnalato ",
   "discussions.posts.status.filter.unanswered": "Senza Risposta",
-  "discussions.posts.status.filter.unresponded": "Unresponded",
+  "discussions.posts.status.filter.unresponded": "Not responded",
   "discussions.posts.filter.myPosts": "I miei post",
   "discussions.posts.filter.myDiscussions": "Le mie discussioni",
   "discussions.posts.filter.myQuestions": "Le mie domande",
@@ -153,7 +155,7 @@
   "discussions.post.removeLike": "A differenza di",
   "discussions.post.viewActivity": "Visualizza attività",
   "discussions.post.closed": "Post chiuso per risposte e commenti",
-  "discussions.post.relatedTo": "Relativo a",
+  "discussions.post.relatedTo": "Related to",
   "discussions.editor.delete.post.title": "Elimina messaggio",
   "discussions.editor.delete.post.description": "Sei sicuro di voler eliminare definitivamente questo post?",
   "discussions.post.closePostModal.title": "Chiudi messaggio",
@@ -175,5 +177,6 @@
   "discussions.topics.sort.courseStructure": "Struttura Corso",
   "discussions.topics.find.label": "Search topics",
   "discussions.topics.archived.label": "Archiviati",
-  "discussions.topics.unnamed.label": "Unnamed Topic"
+  "discussions.topics.unnamed.label": "Unnamed category",
+  "discussions.subtopics.unnamed.label": "Unnamed subcategory"
 }
\ No newline at end of file
diff --git a/src/i18n/messages/pl.json b/src/i18n/messages/pl.json
index f6abb09f..b3896eaa 100644
--- a/src/i18n/messages/pl.json
+++ b/src/i18n/messages/pl.json
@@ -4,6 +4,7 @@
   "discussions.comments.comment.addResponse": "Dodaj odpowiedź",
   "discussions.comments.comment.addComment": "Add a comment",
   "discussions.comments.comment.abuseFlaggedMessage": "Content reported for staff to review",
+  "discussions.actions.back.alt": "Back to list",
   "discussions.comments.comment.responseCount": "{num, plural,\n=0 {No responses}\none {Showing # response}\nother {Showing # responses}\n}",
   "discussions.comments.comment.endorsedResponseCount": "{num, plural,\n=0 {No endorsed responses}\none {Showing # endorsed response}\nother {Showing # endorsed responses}\n}",
   "discussions.comments.comment.loadMoreComments": "Załaduj więcej komentarzy",
@@ -47,7 +48,6 @@
   "discussion.learner.allActivity": "All activity",
   "discussion.learner.posts": "Posts",
   "discussions.actions.button.alt": "Menu czynności",
-  "discussions.actions.back.alt": "Back",
   "discussions.actions.copylink": "Copy link",
   "discussions.actions.unpin": "Unpin",
   "discussions.actions.close": "Close",
@@ -123,6 +123,8 @@
   "discussions.post.editor.anonymousToPeersPost": "Post anonymously to peers",
   "discussions.editor.posts.editReasonCode": "Powód edycji",
   "discussions.editor.posts.showPreview.button": "Show Preview",
+  "discussions.topic.noName.label": "Unnamed category",
+  "discussions.subtopic.noName.label": "Unnamed subcategory",
   "discussions.posts.filter.showALl": "Show all",
   "discussions.posts.filter.discussions": "Discussions",
   "discussions.posts.filter.questions": "Pytania",
@@ -132,7 +134,7 @@
   "discussions.posts.status.filter.following": "Following",
   "discussions.posts.status.filter.reported": "Reported",
   "discussions.posts.status.filter.unanswered": "Unanswered",
-  "discussions.posts.status.filter.unresponded": "Unresponded",
+  "discussions.posts.status.filter.unresponded": "Not responded",
   "discussions.posts.filter.myPosts": "Moje posty",
   "discussions.posts.filter.myDiscussions": "Moje dyskusje",
   "discussions.posts.filter.myQuestions": "Moje pytania",
@@ -175,5 +177,6 @@
   "discussions.topics.sort.courseStructure": "Course Structure",
   "discussions.topics.find.label": "Search topics",
   "discussions.topics.archived.label": "Archived",
-  "discussions.topics.unnamed.label": "Unnamed Topic"
+  "discussions.topics.unnamed.label": "Unnamed category",
+  "discussions.subtopics.unnamed.label": "Unnamed subcategory"
 }
\ No newline at end of file
diff --git a/src/i18n/messages/tr_TR.json b/src/i18n/messages/tr_TR.json
index 28a2ad02..503786d8 100644
--- a/src/i18n/messages/tr_TR.json
+++ b/src/i18n/messages/tr_TR.json
@@ -4,6 +4,7 @@
   "discussions.comments.comment.addResponse": "Bir cevap ekle",
   "discussions.comments.comment.addComment": "Bir yorum ekle",
   "discussions.comments.comment.abuseFlaggedMessage": "Personelin incelemesi için bildirilen içerik",
+  "discussions.actions.back.alt": "Back to list",
   "discussions.comments.comment.responseCount": "{num, plural,\n      =0 {No responses}\n      one {Showing # response}\n      other {Showing # responses}\n    }",
   "discussions.comments.comment.endorsedResponseCount": "{num, plural,\n      =0 {No endorsed responses}\n      one {Showing # endorsed response}\n      other {Showing # endorsed responses}\n    }",
   "discussions.comments.comment.loadMoreComments": "Daha fazla yorum yükle",
@@ -47,7 +48,6 @@
   "discussion.learner.allActivity": "All activity",
   "discussion.learner.posts": "Gönderiler",
   "discussions.actions.button.alt": "Eylemler menüsü",
-  "discussions.actions.back.alt": "Geri",
   "discussions.actions.copylink": "Copy link",
   "discussions.actions.unpin": "İşareti kaldır",
   "discussions.actions.close": "Kapat",
@@ -123,6 +123,8 @@
   "discussions.post.editor.anonymousToPeersPost": "Akranlarına anonim olarak gönder",
   "discussions.editor.posts.editReasonCode": "Düzenleme nedeni",
   "discussions.editor.posts.showPreview.button": "Önizlemeyi Göster",
+  "discussions.topic.noName.label": "Unnamed category",
+  "discussions.subtopic.noName.label": "Unnamed subcategory",
   "discussions.posts.filter.showALl": "Tümünü göster",
   "discussions.posts.filter.discussions": "Forumlar",
   "discussions.posts.filter.questions": "Sorular",
@@ -132,7 +134,7 @@
   "discussions.posts.status.filter.following": "Takip ediliyor",
   "discussions.posts.status.filter.reported": "Rapor edildi",
   "discussions.posts.status.filter.unanswered": "Cevaplanmamış",
-  "discussions.posts.status.filter.unresponded": "Unresponded",
+  "discussions.posts.status.filter.unresponded": "Not responded",
   "discussions.posts.filter.myPosts": "Gönderilerim",
   "discussions.posts.filter.myDiscussions": "Tartışmalarım",
   "discussions.posts.filter.myQuestions": "Sorularım",
@@ -175,5 +177,6 @@
   "discussions.topics.sort.courseStructure": "Ders Yapısı",
   "discussions.topics.find.label": "Search topics",
   "discussions.topics.archived.label": "Arşivlenmiş",
-  "discussions.topics.unnamed.label": "Unnamed Topic"
+  "discussions.topics.unnamed.label": "Unnamed category",
+  "discussions.subtopics.unnamed.label": "Unnamed subcategory"
 }
\ No newline at end of file
diff --git a/src/i18n/messages/zh_CN.json b/src/i18n/messages/zh_CN.json
index cd527fec..3ee7fbcb 100644
--- a/src/i18n/messages/zh_CN.json
+++ b/src/i18n/messages/zh_CN.json
@@ -4,6 +4,7 @@
   "discussions.comments.comment.addResponse": "Add a response",
   "discussions.comments.comment.addComment": "Add a comment",
   "discussions.comments.comment.abuseFlaggedMessage": "Content reported for staff to review",
+  "discussions.actions.back.alt": "Back to list",
   "discussions.comments.comment.responseCount": "{num, plural,\n      =0 {No responses}\n      one {Showing # response}\n      other {Showing # responses}\n    }",
   "discussions.comments.comment.endorsedResponseCount": "{num, plural,\n      =0 {No endorsed responses}\n      one {Showing # endorsed response}\n      other {Showing # endorsed responses}\n    }",
   "discussions.comments.comment.loadMoreComments": "Load more comments",
@@ -47,7 +48,6 @@
   "discussion.learner.allActivity": "All activity",
   "discussion.learner.posts": "Posts",
   "discussions.actions.button.alt": "Actions menu",
-  "discussions.actions.back.alt": "Back",
   "discussions.actions.copylink": "Copy link",
   "discussions.actions.unpin": "Unpin",
   "discussions.actions.close": "Close",
@@ -123,6 +123,8 @@
   "discussions.post.editor.anonymousToPeersPost": "Post anonymously to peers",
   "discussions.editor.posts.editReasonCode": "Reason for editing",
   "discussions.editor.posts.showPreview.button": "Show Preview",
+  "discussions.topic.noName.label": "Unnamed category",
+  "discussions.subtopic.noName.label": "Unnamed subcategory",
   "discussions.posts.filter.showALl": "Show all",
   "discussions.posts.filter.discussions": "Discussions",
   "discussions.posts.filter.questions": "Questions",
@@ -132,7 +134,7 @@
   "discussions.posts.status.filter.following": "Following",
   "discussions.posts.status.filter.reported": "Reported",
   "discussions.posts.status.filter.unanswered": "Unanswered",
-  "discussions.posts.status.filter.unresponded": "Unresponded",
+  "discussions.posts.status.filter.unresponded": "Not responded",
   "discussions.posts.filter.myPosts": "My posts",
   "discussions.posts.filter.myDiscussions": "My discussions",
   "discussions.posts.filter.myQuestions": "My questions",
@@ -175,5 +177,6 @@
   "discussions.topics.sort.courseStructure": "Course Structure",
   "discussions.topics.find.label": "Search topics",
   "discussions.topics.archived.label": "Archived",
-  "discussions.topics.unnamed.label": "Unnamed Topic"
+  "discussions.topics.unnamed.label": "Unnamed category",
+  "discussions.subtopics.unnamed.label": "Unnamed subcategory"
 }
\ No newline at end of file